All the replies are good advice.
Next, think about how a hawk or cat other predator would approach something small and edible. Mostly a pounce from above. You don't want to trigger his fight or flight response. So move slowly and approach on his level. If the cage opens from the top, put your hand in at the far end of the cage from the snake. Flatten your hand and place the back on the cage floor. Then slowly approach the snake, stopping when he tenses up. Or a small hook may be used to raise the snake until you can slide your hand under him.
Good luck.